ALLEN: MAMMALIA. 211 
mastoid breadth, 11; mandible from condyle to tip of incisor, 17; upper molar 
row, 5.4; lower molar row, 5.3. 
Mr. Oldfield Thomas (1909, p. 976) has recorded two specimens of this 
species from the Province of Shansi, twelve miles northwest of Kolanchow at 
an altitude of 7,000 feet. 
Microtus CHINENSIS Thomas. 
The type of this vole was taken from the stomach of a snake at Kiatingfu 
in western Szechwan. At Washan, western Szechwan, Mr. Zappey obtained 
a series of twenty-one skins at altitudes of from 6,000 to 10,000 feet and 
Thomas (1911, p. 175) has recorded specimens from Omeihsien and 23 miles 
south of Tachienlu. The remarkable development of the third upper molar, 
the comparatively long tail, the presence of six pads on the sole of the hind foot, 
and the possession of four mammae are peculiarities already pointed out by 
Thomas and used by Miller as the basis of the separation of this species as 
the type of the subgenus, Anteliomys. 
Microtus (HoTHENOMYS) MELANOGASTER (Milne Edwards). 
Apparently this is a commonly distributed species in the highlands of 
southwestern China. Mr. Zappey obtained specimens from Hsientientze and 
Changyanghsien, Hupeh, and from Washan in western Szechwan, at altitudes of 
from 4,150 feet at the second locality to 8,000 feet at the last named. Thomas 
has also recorded it from northwestern Fukien. One specimen of our series is 
partially albinistic with a white median ventral line from the chin to a point 
between the fore legs where it joins a small white patch some 14 mm. in trans- 
verse diameter. 
The measurements of an adult, No. 7800, taken in the flesh by the collector, 
are:— total length, 129 mm.; tail, 39; hind foot, 16. The skull of No. 7802 
measures :— greatest length, 23.4; basal length, 21.5; palatal length, 12.2; 
zygomatic breadth, 13; mastoid breadth, 11; interorbital constriction, 4; man- 
dible from condyle to tip of incisor, 16.2; greatest depth of mandible from coro- 
noid process, 7.6; upper cheek teeth, alveoli, 6; lower cheek teeth, alveoli, 6.1. 
Microtus (HoTHENOMYS) AURORA, sp. Nov. 
Type:— Skin and skull No. 7788 M. C. Z., male, from Changyanghsien, 
Hupeh, China. February 2, 1909, Walter R. Zappey. 
